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Cu-base alloy baseband for coated conductor and preparation method thereof

A technology of coated conductors and base alloys, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problem of the reduction of cubic texture content, the base band is easily oxidized, and the impact on the epitaxial growth of subsequent transition layers and superconducting layers and other issues, to achieve the effect of good oxidation resistance, improved mechanical properties, and good electrical conductivity

Inactive Publication Date: 2010-11-10
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found through research that the traditional copper-nickel alloy baseband material is easily oxidized during the subsequent epitaxial growth of the transition layer and the superconducting layer YBCO, which reduces the content of the cubic texture, thereby affecting the subsequent transition layer and superconducting layer. Epitaxial growth of the conducting layer, which ultimately affects the properties of coated superconductors

Method used

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  • Cu-base alloy baseband for coated conductor and preparation method thereof
  • Cu-base alloy baseband for coated conductor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The high-purity Cu powder, Ni powder and W powder are Cu 48 Ni 51.3 W 0.7 Weigh and mix the powder according to the ratio, and then use a high-energy ball mill for ball milling. After being fully mixed, put the mixed powder into the mold; then the above-mentioned powder that has been placed in the mold is pressed by traditional powder metallurgy cold isostatic pressing Forming, wherein the pressure is 250MPa, holding pressure for 5min; 2 Under the protection of mixed gas or under vacuum conditions, homogenization treatment is carried out at 1000°C, and the sintering time is 10 hours to obtain the initial billet; the initial billet is cold-rolled, and the deformation of each pass is 5-15%. When the deformation is greater than 80%, in Ar / H 2 Mixed gas protection or intermediate heat treatment at 500°C under vacuum conditions, the heat treatment time is 1h; continue rolling the deformed base strip that has been heat-treated, and finally obtain a cold-rolled base strip w...

Embodiment 2

[0027] Cu powder, Ni powder and W powder are Cu powder by atomic percentage 50 Ni 48.5 W 1.5 Weigh and mix the powder according to the ratio, and then grind it with a high-energy ball mill. After it is fully mixed, put the mixed powder into the mold; Forming, wherein the pressure is 250MPa, holding pressure for 5min; 2 Under the protection of mixed gas or under vacuum conditions, the homogenization treatment is carried out at 1100°C, and the sintering time is 15 hours to obtain the initial billet; the initial billet is cold-rolled, the deformation of each pass is 5-15%, and the total deformation is greater than 95%. Get the cold-rolled base strip that thickness is 80um; The cold-rolled base strip is in Ar / H 2 Anneal at 200° C. for 30 minutes under a protective atmosphere of mixed gas, and then raise the temperature to 900° C. and anneal for 120 minutes to obtain the final alloy base strip.

Embodiment 3

[0029] Cu powder, Ni powder and W powder are Cu powder by atomic percentage 60 Ni 37 W 3 The proportion of powder is weighed and mixed, and then ground by a high-energy ball mill. After being fully mixed, the mixed powder is put into a mold; Sintering under pressure, wherein the sintering pressure is 50Mpa, the sintering temperature is 800°C, and the time is 5min to obtain a compact, and then the compacted compact is placed in Ar / H 2 Homogenization treatment is carried out under the protection of mixed gas or vacuum at 1000°C, and the sintering time is 1h to obtain the initial billet; the initial billet is cold-rolled, with a deformation of 5-15% in each pass and a total deformation of more than 95%. Get the cold-rolled base strip that thickness is 90um; The cold-rolled base strip is in Ar / H 2 Anneal at 300° C. for 30 minutes under a protective atmosphere of mixed gas, and then raise the temperature to 900° C. and anneal for 120 minutes to obtain the final alloy base strip....

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Abstract

The invention discloses a Cu-base alloy baseband for a coated conductor and a preparation method thereof, which belong to the technical field of metal baseband of high-temperature superconducting coated conductors. The alloy baseband comprises the following components in atomic percentage: 48 to 68 percent of Cu, 30 to 50 percent of Ni, and 0.3 to 3 percent of W. The preparation method adopts powder metallurgy and comprises the following steps of: (1) mixing initial powder and filling a die; (2) pressing and sintering an alloy pressed green compact; (3) performing thermom echanical rolling on an initial blank ingot; and (4) performing recrystallization and heat treatment on a cold rolling baseband. The alloy baseband has the characteristics of no magnetism, high oxidation resistance, high electric conductivity, high cubic texture and the like.

Description

technical field [0001] The invention relates to a Cu-based alloy base belt for a coated conductor and a preparation method thereof, belonging to the technical field of high-temperature superconducting coated conductor metal base belts. Background technique [0002] With people's in-depth research, it is found that YBa 2 Cu 3 o 7-x (YBCO) as the representative of the second-generation high-temperature superconducting coated conductor has superior performance, especially in the field of strong electricity has a wide range of application prospects. The preparation of high-performance metal substrates is the prerequisite for the preparation of high-performance coated superconductors. The baseband material used as a coated conductor not only requires the material to obtain a high cubic texture, but also requires the baseband material to have low magnetic properties and high electrical conductance. Because the superconductor with high critical current can only be obtained by d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06B22F3/16C22F1/08B21B37/16
Inventor 邱火勤索红莉田辉马麟刘敏王营霞袁冬梅王丽敏
Owner BEIJING UNIV OF TECH
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